Question

We see that 35 of the 47 compact vehicles have front wheel drive while 38 of the 41 midsize vehicles have front wheel drive. We wish the test that the proportion of front wheel drive cars is the same in compact and midsize vehicles. Formally, we will test H0 : pc = pm vsHa : pc ̸= pm, where pc and pm are the proportion of front wheel drive

6

cars in compacts and midsize cars. We will test at the 5% significance level. You may assume that the normal approximation is appropriate for these problems.

Answer 1